* {
  /* 初始化 */
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  height: 100vh;
  /* 弹性布局 居中显示 */
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #efefef;
}
.container {
  width: 100vw;
  max-width: 850px;
  height: 350px;
  background-color: #fff;
  border-radius: 25px;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.3);
  position: relative;
}
.card {
  /* 弹性布局 垂直居中 */
  display: flex;
  align-items: center;
  width: 100%;
  height: 350px;
  padding-left: 30px;
  /* 绝对定位 */
  position: absolute;
  /* 溢出隐藏 */
  overflow: hidden;
}
.card .img {
  width: 260px;
  height: 260px;
  border-radius: 20px;
  overflow: hidden;
  /* 防止被挤压 */
  flex-shrink: 0;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.2);
}
.card .img img {
  width: 100%;
  height: 100%;
  /* 图片默认隐藏 */
  opacity: 0;
  /* 过渡效果 */
  transition: 0.6s;
}
/* 通过单选框的checked来显示指定图片 */
/* ~是兄弟选择器 */
#slide_1:checked ~ .card-1 img,
#slide_2:checked ~ .card-2 img,
#slide_3:checked ~ .card-3 img {
  /* 图片显示 */
  opacity: 1;
  /* 过渡延迟 */
  transition-delay: 0.2s;
}
.card .content {
  flex: 1;
  padding: 0 30px 0 35px;
  position: relative;
  /* 默认偏右一点 */
  left: 50px;
  /* 文本内容默认隐藏 */
  opacity: 0;
  /* 过渡效果 */
  transition: 0.6s;
}
/* 通过单选框的checked来显示指定文本内容 */
#slide_1:checked ~ .card-1 .content,
#slide_2:checked ~ .card-2 .content,
#slide_3:checked ~ .card-3 .content {
  opacity: 1;
  z-index: 9;
  left: 0;
  transition-delay: 0.3s;
}
.card .title {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 20px;
}
.card .text {
  font-size: 17px;
  color: #555;
  text-align: justify;
  margin-bottom: 25px;
}
.card a {
  padding: 13px 20px;
  background-color: #000;
  color: #fff;
  text-decoration: none;
  border-radius: 50px;
  letter-spacing: 1px;
  font-weight: 600;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.2);
  float: right;
}
/* 指示器 */
.slider {
  position: absolute;
  bottom: 25px;
  left: 55%;
  transform: translateX(-50%);
  z-index: 1;
}
.slider .slide {
  width: 50px;
  height: 10px;
  background-color: #dfdfdf;
  display: inline-flex;
  margin: 0 3px;
  border-radius: 5px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
/* 指示器的黑色进度条 */
.slider .slide::before {
  content: '';
  width: 0%;
  height: 100%;
  background-color: #000;
  border-radius: 5px;
  position: absolute;
  left: 0;
  top: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.6s;
}
/* 通过单选框的checked来显示指定指示器的黑色进度条 */
#slide_1:checked ~ .slider .slide-1::before,
#slide_2:checked ~ .slider .slide-2::before,
#slide_3:checked ~ .slider .slide-3::before {
  width: 100%;
  transform: scaleX(1);
}
